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https://issues.apache.org/jira/browse/HADOOP-4826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656110#action_12656110
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Tsz Wo (Nicholas), SZE commented on HADOOP-4826:
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+1 patch looks good. Below are the ant test-patch results.
{noformat}
[exec] +1 overall.
[exec] +1 @author. The patch does not contain any @author tags.
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec] +1 Eclipse classpath. The patch retains Eclipse classpath
integrity.
{noformat}
> Admin command saveNamespace.
> ----------------------------
>
> Key: HADOOP-4826
> URL: https://issues.apache.org/jira/browse/HADOOP-4826
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Fix For: 0.20.0
>
> Attachments: saveNamespace.patch, saveNamespace.patch,
> saveNamespace.patch
>
>
> It would be useful to have an admin command that saves current namespace.
> This command can be used before regular (planned) cluster shutdown.
> The command will save the namespace into storage directory(s) and reset the
> name-node journal (edits file).
> It will also reduce name-node startup time, because edits do not need to be
> digest.
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